Supplement related apis for int32/float32 packed types in SVE module.

@tellenbach has added basic SVE feature support for Eigen. Currently, the mandatory functions related to int32 and float32 packed types are implemented in the initial version, so I have a preliminary plan to add more type support (maybe start with uint32 type). However, I find that there are a few functions of int32/float32 packed types that are supported by architectures such as neon/sse but not implemented by sve, so I supplemented these APIs first.